[140973] in North American Network Operators' Group
Contention/Oversubscription maths
daemon@ATHENA.MIT.EDU (Adam Armstrong)
Thu May 26 18:49:41 2011
Date: Thu, 26 May 2011 23:48:48 +0100
From: Adam Armstrong <lists@memetic.org>
To: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Hi All,
Do any of you have any pointers on how to go about predicting usage for
high-speed ethernet access?
I'm running 1GE links into buildings, and hanging many (100-1000) 100M
customers off switches in the basement, simple enough.
I'm assuming ~300Kbps average peak usage per customer, but I can't quite
work out at what point that number becomes more important than the fact
that each user can peak at 100mbit (and that the backhaul is only
access-speed * 10).
I'm well versed in the economies of scale of fitting 10,000 8mbit
customers into 1GE, but this seems altogether a different beast to
predict. If any of you have similar scenarios I'd be very interested to
hear on/off list :)
Finally, what do people think of selling a 1G service with 1G backhaul
(and potentially 10s or 100s of customers buying this service alongside
n*100s of customers with 100M service)?
Thanks,
adam.
